It is more than just a issue of underhood heat. If the heat is less under the hood, WHY? Because more of the heat stays in the header tube, the hotter the exhaust gasses, the faster it moves, more velocity, more velocity equal better scavenging of the exhaust, which results in better cylinder filling of the engine, which makes more power. How much power depends on your particular combo. It is defenatly worth the extra bucks in my opinion.
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No matter how much you spend, or how much you prepare, there is ALWAYS someone else faster or quicker than YOU!!!!!!!!!!
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